Directions: In the following question, you will find a sentence divided into four parts. One part has been omitted and replaced by a blank. The other three parts are jumbled randomly. Among the options provided, select the one that contains the phrase suitable to replace the blank and presents the correct order of the parts to form a coherent and meaningful sentence.

India's technological progress is substantial, (A) ___________________________ (B) but achieving social and human development (C) the key to a giant leap in economic growth. (D)